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Vacuum Advance Control Solenoid: Description and Operation
The vacuum advance VSV (vacuum solenoid valve) blocks the vacuum source to the advance diaphragm during cold start and engine warm-up periods. The vacuum ports are closed when the
solenoid is energized. The solenoid is connected in parallel circuit with the
EFE heater, to the
EFE relay, so it is energized and de-energized simultaneously with the
EFE system